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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Elastomers and Composites
Journal Basic Information
Journal DOI :
The Rubber Society of Korea
Editor in Chief :
Volume & Issues
Volume 42, Issue 4 - Dec 2007
Volume 42, Issue 3 - Sep 2007
Volume 42, Issue 2 - Jun 2007
Volume 42, Issue 1 - Mar 2007
Selecting the target year
A Study of Bi-Axial Stretching Process for the PTFE Membrane (II)
Shin, Hong-Chul ; Kim, Sung-Chul ; Cho, Ur-Ryong ;
Elastomers and Composites, volume 42, issue 3, 2007, Pages 137~142
In the performance test of polytetrafluoroethylene (PTFE) membrane, melting temperature and crystallinity were
and 42.5%, respectively, according to TGA and DSC analysis. These values were similar to those of commercially available GE Osmonics PTFE membrane. The average of pore size was observed
and the average flow rate was 1.570 LMH. These are slightly higher values than those of GE Osmonics sample. The filtering efficiency rate was 30.5%.
Effects of temperature on Hardness and Stiffness of NR and SBR Vulcanizates
Jin, Hyun-Ho ; Hong, Chong-Kook ; Cho, Dong-Lyun ; Kaang, Shin-Young ;
Elastomers and Composites, volume 42, issue 3, 2007, Pages 143~150
Hardness of rubbery materials, which is important for dimensional stability and product performance, was investigated upon temperature change in this study. A newly developed IRHD (International Rubber Hardness Degree) tester was used to measure the hardness changes of NR and SBR specimens at various temperatures and the hardness values were compared with the Young's modulus. The harness and Young's modulus of NR and SBR showed an abrupt change near the glass transition temperatures. The hardness and Young's modulus were increased by increasing temperature due to the increased random chain conformation of molecules. The effect of temperature on hardness and Young's modulus of NR and SBR specimens filled with carbon black and silica was decreased by increasing filler content.
Characterization of PMMA/MWNT Composites Fabricated by a Twin Screw Extruder
Woo, Jong-Seok ; Lee, Geon-Woong ; Kye, Hyoung-San ; Shin, Kyung-Chul ; Bang, Dae-Suk ;
Elastomers and Composites, volume 42, issue 3, 2007, Pages 151~158
MWNTs have been widely investigated due to unique properties of such as good electrical conductivity and thermal stability in polymer composites industries. This paper established the procedure to fabricate PMMA/MWNT composites by a modular intermeshing co-rotating twin screw extruder with L/D ratio of 42. The electrical properties of PMMA/MWNT composites with different content of MWNT have been investigated. A sheet resistance percolation was observed at 4 wt% of MWNT for the melt processed composites. Sheet resistance of PMMA/MWNT composite film containing 4 wt% of MWNT was nearby
and this shows the possibility of potential application to EMI (Electronic Magnetic Interference) shielding materials. The characteristics of composites were analyzed by TGA, DSC, and SEM. In addition, MFI (Melt Flow Index) has been measured to analyze the rheological property.
Experimental Investigation on the Non-linearity of Nitrile Butadiene Rubber
Yoo, Myung-Ho ; Lee, Taek-Sung ; Do, Je-Sung ; Kwon, Jong-Ho ;
Elastomers and Composites, volume 42, issue 3, 2007, Pages 159~167
Hydraulic actuators are used widely for industrial machinery. The seal made from elastomer is used as a core part of the actuator, NBR(nitrile butadiene rubber) materials with high quality of oil resistance and abrasion resistance is used widely, requiring excellent characteristic of sealing. According to applied circumstances, the actuators for industrial machinery are used under different temperature situations. In this study, three different kinds of NBR, which is Hs70, 80, 90 are determined as one of hydraulic materials. An experimental investigation is performed to confirm the non-linearity under different temperature (
) situation, material constants for finite element analysis and plastic deformation in accordance with Load-unload.
Determination of Strain Energy Function of Rubber Materials Considering Stress Softening Behavior
Kim, W.S. ; Hong, S.I. ;
Elastomers and Composites, volume 42, issue 3, 2007, Pages 168~176
When the rubber vulcanizates reinforced with carbon black or silica are subjected to cyclic loading from its virgin state, the stress required on reloading is less than that on the initial loading. This stress softening phenomenon is referred to as the Mullins effect. The strain energy function of rubber vulcanizates was investigated using theory of pseudo-elasticity incorporated damage parameter that Ogden and Roxburgh have proposed to describe the damage-induced stress softening effect in rubber-like solids. The quasi-static cyclic loading test was performed using the NR-SBR vulcanizates reinforced with carbon black, and then the effect of a damage parameter to stress-strain curve in reloading and subsequent reloading paths was studied. The strain energy function of the rubber vulcanizates with a different filler content was also evaluated.
Thermal Properties and Flame Retardancy of Poly(amic acid)/organoclay Nanocomposites
Kim, Sun ; Yoon, Doo-Soo ; Jo, Byung-Wook ; Choi, Jae-Kon ;
Elastomers and Composites, volume 42, issue 3, 2007, Pages 177~185
Polyamic acid(PAA)/organoclay nanocomposites containing phosphorous were prepared by solution blending of phosphorylated PAA(PPAA) and organically modified montmorillonite(O-MMT) as a type of layered clays. The nanocomposites were characterized by FT-IR, DSC, TGA, PCFC, SEM, and XRD. The preparation of nanocomposites was confirmed by FT-IR and XRD. SEM pictures showed that the organoclay was dispersed well in the PAA matrix relatively. XRD results indicated that the O-MMT layers were intercalated. The thermal stability and flame retardancy of O-MMT/PPAA nanocomposites were higher than those of pure PAA. PCFC results also showed that the heat release capacity and total heat release values of O-MMT 4 wt%/PPAA-0.2, 0.4, 0.6 composites were decreased with increasing the mole ratio of phosphorous. It was found that the nanocomposite films had the potential to be used as a fire safe material.